On the interaction of metal nanoparticles with supports

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Krisztian Kordas, Anne-Riikka Rautio, Gabriela S. Lorite, Melinda Mohl, Päivi Mäki-Arvela, Jyri-Pekka Mikkola, Dmitry Murzin, Liehui Ge, Pulickel M. Ajayan, Robert Vajtai
Publication year: 2015
Journal: Topics in Catalysis
Volume number: 58
Issue number: 14
Start page: 1127
End page: 1135
eISSN: 1572-9028


Abstract

Metal nanoparticles supported on surfaces often undergo sintering even at moderate temperatures. The degree of sintering is typically influenced by the surface chemistry indicating that besides the commonly believed Ostwald ripening also other processes associated with metal surface diffusion are responsible for the nanoparticle size growth. In addition to the deterioration in metal dispersion, carbon supports can show chemical instability leading to their partial degradation in the proximity of the nanoparticles both in reducing and oxidizing environments at elevated temperatures. This work reports a study of Pd, Pt and Ni nanoparticles anchored on carbon (activated carbon, graphite and carbon nanotubes) as well as titania (nanoparticles and microparticles) surfaces frequently applied as catalyst materials in heterogeneous catalysis and photocatalysis, and evaluate the potential events causing metal sintering and degradation of the supports using transmission electron microscopy analysis.

Last updated on 2019-21-07 at 04:35